Mixing valve



Mar 6, '1923. 1,447,391

, R. A. LIPSCOMB v MIXING VALVE 'Filed June 27,-1921 2 sheets-Sheet 1 gllvcfrol RobiA A lexcmder LPscomla Mar. 6, 1923, 1,547,391

` Fx` A. LIPSCOMB MIXNG VALVE Filed June 2v', 1921 2 sheets-sheet 2 Patented Mar. 6, i923.

ROBERT A. LIIPSCOMB, OF HOLT, ALAB.

MIXING- VALVE.

Application led .Tune 27, 1921. Serial No. 480,883.

To all whom t may concern.' i

Be it known that I, ROBERT A. LIrsooMB, a citizen of the United States of America, residing at. Holt, in the county of Tuscaloosa and State of Alabama, have invented certain new and useful Improvements in Mixing Valves, of which the following is a specification.

My invention relates to mixing valves for Y the burning of gas and is more particularly concerned in the production of a kmovable valve which will not only eiect an intimate and perfectmixture of air and gas but which will control and regulate, by its adjustment, the proportions of both elements.

One object of my invention is to provide the burner with a single hollow. valve movable relatively to both the air and gas inlet ports to simultaneously control the opening of both.

A furtherobject of my invention is to so design the valve as to permit the introduction of the air through the valve while the gas is admitted about the valve and How with an ejector effect around the air supply port of the valve to induce the inflow of air.

A further object of my invention is to improve the design of the valve as adapted for use with boilers, and to this end the valve is provided with a lsubstantially cylindrical body which merges at one end intoan elongated and restricted tapered discharge nozzle which itself constitutes both the air supply port and the gas valve while at its cooperation with an adjustable cone to regulate the volume of air admitted.

My invention further comprises the novel details ot' construction and .arrangements of parts, which in their preferred embodiment only are illustrated in the accompanying drawings, which form a part of this speciication, and in` which Fig. 1 is a front view ot the complete burner.

Fig. 2 is a vertical cross sectional view talreuon the line 2-2 of Fig. l with the lvalve and its attached parts shown in side elevation.

Fig. 3 is a horizontal cross sectional view taken on the line 3- -3 of Fig. 2 withthe valve details shown partly in plan and partly broken away.

Fig. 4 is an end view of the valve..

other end the body portion is left yopen for Figs. 5 and 6 are cross sectional views taken respectively on the lines 5-5 and 6 6 of Fig. 4.

Similar reference numerals refer to similar parts throughout the drawings.

l have illustrated my invention as applied to a mixing valve suitable for burning gas under boilers, but it is to be under-stood that its size and `detailed structure may be widely varied as applied to diierent uses.

In the embodiment. illustrated, l show the gas supply delivered through a pipe l past the present well known type of slide valve 2 into the valve casing 3 which has a right angled burner nozzle 4- adapted to enter the boiler or combustion chamber typically indicated at 24.y Across the inner end of the passage through this nozzle 4 is a transverse' partition 5 having a taper valve seat 6 therein facing toward the combustion chamber. The casing is divided into half sections on a horizontal plane extending centrally through the valve seat 6 and the casing sections are provided with flanges 7 which `are bolted together after the valve, which will 'now be described, is assembled inthe casing. y

It will be observed, by reference to Fig. 3, thatl the type ot valve which I consider preferable for my purposes is of the wide thin type to the end that av wide spread. distribution of the combustible mixture will result. As shown the valve is formed ot' two body portions 8 and 9, one being an outer cylindrical sleeve 0r body 8 and the other being a hollow iaring nozzle 9 which is gradually flattened from a 4circular inner end 9a that kreceives and is connected to the sleeve 8. The outer end of the nozzle is enlarged for its full width and reversely tapered to form by its outer side a valve face 10 and by its inner side an elongated narrow tapering air supply port or nozzle 11, which extends the full width of the fvalve, as is more clearly indicated in Figs. 4 and 6. At each end on its under face the tapered inner end of the valve is provided with legs or supports 12 which rest on the underside of the casing nozzle 4. and slide thereon as the valve is adjusted throughout it's operating positions, thereby preventing any tendency of the wide valve to tilt or cock.

The tubular valve body 8 passes through opening lever 20.

a'central opening 13 in the outer wall of the valve casing 3, there being a suitable stuiiing box 14 and gland 15 to provideia tightpacking about the body while leav ing it free to slide in and out therethrough. The outer end. ot theA body is left open and I attach to anysuitableA support such as the pipe 1 an angled 'bracket 11b, which, at its lower end in line with the axis of the cylindrical body 8, is provided with a threaded opening for the reception yof a screw 'shanlrl' carrying an air control cone t18,!which is-adjustable towards and adapted by the extent to which it enters the open end of body 8 to control the cross sectional area oi' the air admission opening to the `hollow valve. At one side of the casing 3 I attach lugs 19 to which I pivot a valve f This lever at its cent/er is provided with an' annular band 2l `which loosely surrounds the valve body 8 and i is connected thereto by having elongated slots 122' in the ring receive pins 23 on the sleeve. By grasping the free end of the lever 20, the valve as a whole can be adjusted axially withrelation to its gas inlet valve Vseat ('f and the air-` inlet control cone 18 to thereby ljointly and simultaneously control the admission of air and gas through the valve casing nozzle 4i to the boiler furnace. The

air .admitted through the body 8 is distributed by the flattened tubular valve and discharged ultimately through the air supply nozzlell,` its volumebeing jointly. controlled by thefejector actionA of the gas Howingabout thenozzle 1l and by the relative adjustment of the cone 18 to the air intake end .of the valve. .Vhen the cone 18 has i c-been properly adjusted to admit the requilsite vvolume of air forthe gas, thejoint con trol of bothair, andgas -is attained merely bythe :axial adjustment of the valve. `As thevalve is movedA outwardly :from the furnace .24e the .volume of v.air and gas `are gradually reduced and as it is moved kinvvardly their volume istgraduallyincreased, but always vin their predetermined relal'tive proportions. Itf-it be ydesired to 'vary fthe. :volume oi" air admitted, this can `be accomplished `by an independenty adjustment of fthe cone `l'atter the valve is set lto :its `working iposition, rthus increasing the iiexibility of thecontrolfwithoutat thesame t time disturbing the :joint control ot the itwo elements.

My invention in its :broad sense is applicable itoimixing valves of varying types 'according 0,0 ,theduty required and is .not intendedto be restricted tothe specific. type offvalve disclosed.

' Having thus describedfmy invention, what JI claim as newf and I, desire lto secure by Letters lPatent, .is

1. A mixing valve mechanism comprising aa valve :casingrconnected to a :source fof gas supply and having a gas outlet port and opposite thereto an opening, a valve movable inthe` casing andf adapted ato. close said port and to project through said opening, there being an air conduit leading from the exposed outenendof said valve and opening through its inner end opposite said port, and means to regulate the volume ot air admitted through the open outer end of the valve.

2. AimiXing-valve mechanism comprising a valve casing connected to a source of gas supply and having a gas outlet .port :and opposite vthereto an opening,:a .valve movable inthe easing and; adapted to closesaid port and to. project through said opening, means to movelthe valve to open and close? said port and regulate its intakeof air,y and packing to prevent the accessiotairlto `the casing about the outer endroit the valve.

3. In a `mixing valve mechanism, a gas supply casinghaving `an inner itransverse partition provide'dzwith a gas port,-a hollovv valve open at :both endsl which projects through said .port and is :enlarged'to seat againstv and closelsaidport when moved outwardly, said valve having its 4outer endV projecting through and without said casing, a packing about said end, rneansdzov adjust the valve, and means to vary the, admission of air to the open outer end of said'fholloW valve.

4l. ln `a `mixing valve mechanism, -a chamber supplied with gaszand having'fa `:transverse partition `formed Vwith a gas p,ort,`a hollow valve open at :its innerend which is adapted to Vproject through said ,port and when moved outwardly tto ,closesaid port, said valve having communication with a cylindrical out-er end which project-sthrough the valve casing, a packingigland-surounding said cylindrical-end, 'and aicone ,sup-

side a valve seat'and on' its inwardlyfacing end a tapering air supply nozzle, saidvalve having ia tubular body portion adapted to project without the casing, a packing gland surrounding said tubular portion, a

fixed ibracket, a lcone yadjustably mounted thereon opposite the open end of theivalve body, and mea-ns to reciprocate the; valve, substantially as described.`

6. In combination, Aa gas supply (chamber having a transversely elongated burner `noz- 4-Zle with a `partition l,therein :tormed'with an elongated nar-row gas port, said casing being divided into halt sections :through said port, a hollow valve havingfareversely j taperediend which forms lpngatedzfnarrow air supply nozzle at its inner end and which is adapted when moved outwardly to seat against and close said gas port, said valve being shaped to merge into a cylindrical outer end portion, a stuffing boX in the gas Chamber through which said cylindrical end portion of the valve projects, a fixed bracket having an adjustable cone adapted to enter the outer open end ol said Cylindrical portion of the valve, and means to adjust the valve axially to regulate both air and as. g 7. In a mixing valve, a valve chamber having gas inlet and outlet ports, a valve projecting through said outlet port and movable against the direction of flow of the gas stream to close said port, there being an air supply passage opening through the inner end of said valve, and an air regulator towards which the valve is movable in reducing the flow of gas and which is adapted to throttle the inow of air proportionate with the gas.

8. In a mixing valve, a valve Chamber having gas inlet and outlet ports, a valve having an air duct therethrough and an air nozzle at its inner end, said inner nozzle end of the valve being adapted to project through and by an outward movement to Control said gas outlet port with the air nozzle surrounded by the iniowing gas so as to induce by an injector action the inflow of air at the center of the entering gas, and a regulating cone disposed to enter the open outer end of said air duet and adapted to regulate the volumetric iow of air proportionately with the gas.

In testimony whereof I afHX my signature.

ROBERT A. LIPSCOMB.

Witness NOMIE WELSH. 

